Metalworking apparatus



Jan. 19, 1937. s MURPHY T AL 2,068,564-

METALWORKING APPARATU S Original Filed May 28, 1955 3 Sheets-Sheet lATTORNEYS.

Jan. 19, 1937. s. D. MURPHY ET AL METALWORKING APPARATUS Original FiledMay 28, 1935 3 Sheets-Sheet 2 INVENTORS J/l/ELE) .D- MURPHY,

ATTORNEYS.

1937- s. D. MURPHY ET AL v METALWORKING APPARATUS Original Filed May 28,1935 3 Sheets-Sheet 3 F HNK V. 05802.

ATTORNEYS.

Patented Jan. 19, 1937 METALWORKING APPARATUS Shirley D. Murphy andFrank V. ()sborn, llndianapolis, 1nd.

Original application May 28, 1935, Serial No. 23,888. Divided and thisapplication December 18, 1935, Serial No. 55

9 Glaims.

This invention relates to mouldings or similar members to be attached tovarious articles, and especially to an apparatus for making suchmouldings. In particular, it relates to composite moulding strips havinga surface layer or shell of different material from the material withinthe strip; and also to means for attaching such moulding strips to thearticle upon which they are mounted.

One object of our invention is to provide a moulding member composed ofdissimilar materials, such as a layer or shell of corrosion-resistingmetal laid over a base metal and having a fastening portion on the underside of the shell metal.

Another object is to provide means of making a composite moulding byrolling a thin shell around a flat base portion, then forming thisassembly to the final configuration desired, and afterward pressing downthe edges of the shell so that they lie flat against the base portion.

Another object is to provide means of making a moulding strip by rollinga thin strip of metal around a thicker flat base metal strip so that theedges of the shell bend around and lie flat against the opposite side ofthe base portion; then forming this assembly into a convexed form,thereby stretching the shell over the base metal and giving a smoothtightly-attached surface without indentations or irregularities; andafterward clinching the edges of the metal shell to cause them to lieflat against the base portion, these edges having been raised slightlyduring the operation of stretching the shell over the base portion.

Another object is to provide apparatus whereby the metal shell is causedto lie fiat against the base portion.

Another object is to provide apparatus whereby the metal shell istightly stretched over the base metal and its edges caused to firmlypress over the adjacent edges of the base metal.

This application is a division of our copending application, Ser. No.23,888, filed May 28, 1935.

In the drawings:

Figure 1 is a bottom perspective view of the moulding member made by themethod and apparatus of our invention, showing the fastener and aportion of the article to which the moulding member is to be attached.

Figure 2 is a cross section through the moulding member shown in Figure1, looking toward the closed end of the fastener notch.

Figure 3 is a vertical longitudinal section through the moulding membershown in Figure 2, taken along the line 33 thereof.

Figure 4 is a bottom plan View of the moulding member shown in Figures 1to 3, inclusive.

Figure 5 is a bottom perspective view of a modified form of mouldingmember, showing a different type of fastener from that employed inFigure 1.

Figure 6 is a bottom perspective view of another modified form ofmoulding member, wherein the fastener slidably engages the remainingportion of the moulding member.

Figure '7 is a section through another modified form of moulding member,wherein the fastener consists of a screw, nail, rivet or cotter pinfixedly secured to the base portion of the moulding member.

Figure 3 is a diagrammatic view showing the first step in the method ofmaking the moulding member of our invention.

Figure 9 is a view similar to Figure 8, but illustrating the method stepof forming the moulding into its convexed shape, thereby stretching thesurface shell tightly over the base portion.

Figure 10 is a View similar to Figures 8 and 9, but showing theadditional method operation of rebending the edges of the surface shell,which have been somewhat raised during the stretching operation, so thatthese edges again lie fiat upon the base portion.

Figure 11 is a section through another modified form of moulding member,wherein the inner edges of the metal shell serve as flanges for theattachment of the moulding member to the article upon which it is used.

Figure 12 is a rear end elevation of apparatus for stretching andturning over the edges of the metal shell upon the base portion.

Figure 13 is a front end elevation of the apparatus shown in Figure 12.

Figure 14 is a plan View, partly broken away, of the apparatus shown inFigures 12 and 13.

Figure 15 is a right-hand side elevation of the apparatus shown inFigure 12.

Figure 16 is a vertical section along the irregular line l6-l5 of Figure14.

In general, the device made according to our invention consists of amoulding member, usually an elongated strip, and having fastenerssecured to the underside thereof for attachment to the article uponwhich it is mounted. The moulding portion itself consists of a baseportion having a thin strip of different material stretched tightly overit and with the edges thereof lying flat against the underside of thebase portion. The

ning-board being shown for convenience.

such material.

surface shell is preferably of a material of noncorrosive and/or highlyornamental properties, whereas the base portion is of a less expensivebut sufficiently strong material to serve the purpose.

Ihe fastener is secured to the underside of the moulding, and ispreferably of. such a form that it can be instantly fitted into placeand tightened either by the mounting operation, or by a simplemanipulation of the fastener, as hereinafter described. Moulding membersof this type are found highly useful in automobile bodies, radiators orrunning-boards; and also on refrigerators, show-cases, boilers, stovesand other articles whereon such a moulding might be employed.

Referring to the drawings in detail, Figure 1 shows the moulding memberof our invention as consisting of the moulding proper, generallydesignated I, and the fastener, generally designated 2. Also shown inFigure l, in somewhat diagrammatic form, is a portion, generallydesignated 3, of the article to which the moulding is intended to beattached, a portion of an automobile run- The moulding proper I consistsof an outer shell 6 and an inner base portion 5, associated therewith.The edge portions 5 of the outer material 4 are bent around the edges ofthe base portion 5 in such a manner as to lie evenly against it.

The outer portion comprising the shell i is preferably of anon-corrosive and ornamental material, such as stainless steel. Sincethis material is very expensive, the provision of a thin layer thereofresults in a great economy as compared with the cost of making theentire moulding from At the same time,'however, the base portion 5 ismade of a cheaper material with a sufiicient strength and of an edequatethickness to provide rigidity, a suitable material for this purposebeing cold-rolled steel. The composite or laminated construction of ourinvention thus provides an article of the same appearance as if it weremade of expensive surface material throughout, and having sumcientstrength yet without the high cost.

The moulding portion I is attached to the article 3 by means offasteners 2 secured thereto.

The fastener shown in Figure 1 consists of a piece of metal having abent portion I formed with a configuration corresponding to that of thebase portion 5, so as to fit snugly against the latter. Projecting fromthe bent portion I is a portion 8 having a notch 9 with inclined edges,thereby forming a wedge-shaped notch. In the fastener 2 of Figure 1, theprojecting portion ii is made integral with the bent portion I by firstcutting slits along the lines Iii and then bending the portion 8outward, the lines It then becoming the inner edges of. the bent portionI.

The fastener 2 is fixedly secured to the base portion 5 in any suitablemanner, welding having been found satisfactory for this purpose. Inpractice, these fasteners 2 are secured to the moulding portion l atpredetermined intervals, and are then welded in position. Theseintervals are preferably of the same spacing, or at least .of a knownspacing, so that the article 3 may be provided with suitably spacedapertures I I for receiving the projecting portions 8 of the fasteners2. By this construction, the moulding as sembly, consisting of themoulding portion I and the fasteners 2, may be completely manufacturedin one factory and thereafter attached to articles 3. in another factorymerely by providing the slots slot 9 to engage the ends of the apertureII in i such a manner as to draw the moulding firmly against the article8.

The modified form of moulding member shown in Figure 5 is similar inprinciple to that shown in Figures 1 to 4, inclusive, but is providedwith a fastener of somewhat different construction.

This fastener consists, as before, of a bent portion I and a projectingportion 8 formed therefrom by slotting the bent portion 1 along thelines It. The projecting portion 8, however, is subjected to the removalof additional material so that it is given a shape roughly resemblingthe capital letter T. The upright portion 20 of this T -shapedprojection 8 is formed by additionally slotting the metal along thelines 2i, 22 and 23, thereby cutting out rectangular pieces of metal.The fastener is then welded or otherwise fixedly secured to the baseportion 5 in the manner previously described. In assembling the modifiedmoulding shown in Figure 5, the forward portions 2 5 of the projections8 are slipped through the slots I I and twisted on the opposite sidethereof, as by the use of pliers. This twisting operation also tends todraw the moulding portion I tightly against the article 3 upon which itis mounted.

The modified form of moulding member shown in Figure 6 is likewise for asimilar purpose as that shown in Figure I, and similar parts are givencorresponding numerals. In the Figure 6 modification, however, the edgesI5 of the'base portion 5 are flanged and the edges ld'of the surfacematerial bent around these flanges. The

fastener is of a type generally similar to that shown in Figure 5, butits bent portion 25 is adapted to slide in the guideways providedbetween the fianged edges and the inner surface of the base portion 5,It will also be observed that the fastener of Figure 6 is made from asingle piece of metal, bent into suitable form. To this end the metal isslotted to remove a portion thereof, as at 26. The ends are then bentaround to form the T-shaped projection 21, after removing metal alongthe lines 28 and 29 in a manner similar to that described in connectionwith the fastener of Figure 5.

The modified form of moulding shown in cross section in Figure 7 has amoulding portion I, generally similar to that shown in Figure 1.moulding portion I is attached to the article 33, however, by means of abolt, screw, cotter pin, rivet, nail, or similar member, generallydesignated 30. The head 3! of the member 35 is fixedly secured to thebase portion 5, as by welding, and these members 31] are distributed atintervals along the strip. A series of round apertures 32 is then formedin the article 33 to which the device is to be attached; the ends of thebolts or other members 30 are slipped through these holes and the properoperation performed to secure these in place. In the moulding shown inFigure '7 a, bolt has been illustrated, together with The a nut 34 onthe opposite side of the member 33,07

on the base portion l2.

but it will be understood that a rivet or cotter pin could be employed,with the ends thereof in Figure 11 is similar to that shown in Figure 1,

with the exception of the fact that the edges of the metal shell areemployed as flanges for the attachment of the entire member to thearticle upon which it is to be used. To this end the base portion 48 isprovided either with rounded ends,

as previously described and shown in Figure l, or preferably with flatends M upon which the metal shell 52 is bent, as at the corners 43 and44, to form edge portions 45. The portions 46 nearest the corners 44 arepressed into close engagement with the inner side of the base portion4!]. The edges G! of the metal shell, however, are bent away from thebase portion 40 to form flanges 58. By means of these flanges 48 anysuitable fastener, such as 2, shown in Figure 2, may be inserted andemployed to hold the moulding in engagement with the article, such as 3(Figure 1), in connection with which it is to be used.

In making the moulding portion, generally designated I, the steps oroperations diagrammatically shown in Figures 8 to 10 are followed. Inthis method a flat strip I! of the base material and a thin strip l3 ofthe cover or surface material are rolled together so that the edges M ofthe latter are bent around the former and -lie flat against it. Thearticle shown in Figure 8 is then subjected to a further rollingoperation to give it any desired convex shape, the curved shape shown inFigure 9 being chosen for purposes of illustration. This operationcauses the surface material l3 to be stretched tightly over the basematerial l2, due to the fact that it extends over a greater distancethan the inner material !2,

Zwhereas the edges of the latter serve somewhat to clamp the edges ofthe surface shell l3 during this operation. To some extent, however, the

edges l4 become bent upward during this operation, as shown in Figure 9.Accordingly, the

article is now subjected to a further rolling operation to cause theseedges H! to lie flat against the inner surface of the base portion [2.

During the above operations the base portion l2 has been provided withflanges l5 along its edges, these being intended to serve the purpose ofthe construction shown in Figure 6. When the edges I 3 of the surfacematerial are again pressed into position after the convexing operationshown in Figure 9, the edges M are pressed firmly down against the innersurfaces of the flanged edges 5 5 It will be understood, however, thatthe flanged edges l5 are omitted when the moulding of the type shown inFigure 1 is made, the edges 6 being folded down against the edge of thebase portion 5. It will be further understood that the shape of themoulding may be of any desired form and not necessarily of a cylindricalconfiguration, as shown in the figures. The moulding, for example, mayhave flat or bevelled portions instead of the curved surfaces,

stretched surface coating of our invention.

Electroplating methods of depositing a surface coating also tend toresult in a surface coating of uneven thickness and one which dependsfor its grip upon the perfect engagement of the coating with the basematerial. To obtain the surface coating of the same thickness, asprovided in our invention, the electroplating operation would also needto be unduly protracted so as to deposit a sufficiently thick layer ofmetal, and this oper tion would therefore be very expensive.

The apparatus for transforming the metal shell and base from theposition shown in Figure 9 to that shown in Figure 10 comprises theclinching device illustrated in Figures 12 to 16, inclusive. It will beunderstood that the apparatus for transforming the flat composite stripof Figure 8 into the curved strip of Figure 9 consists of cooperatinggrooved rolls of the kind known to those skilled in the art.

The apparatus consists of a base 58 which is adapted to be mounted uponthe bed 5! of the rolling machine. The details of the rolling machineare not shown, but merely comprise well known means for feeding thecomposite metal strip to and from the apparatus shown in Figures 12 to16. The base 50 is provided with an upright portion 52, having spacedarms 53 and 54 projecting upwardly therefrom (Figure 12). These arms arebored, as at 55, to receive the shaft 56. The latter serves to providesupport for the rollers 51!. The spaced arms 53 and 54 are alsoadditionally bored, as at 58 (Figures and 16) to receive the shaft 59.The latter serves as a pivot shaft for an L-shaped member, generallydesignated 59 (Figure 16). The lower arm 5i of this L-shaped member isengaged by a coil spring 52 mounted in the bore 63 of the base: 50. Theopposite end of this coil spring 62 is provided with a cap 6 3, engagedby an adjusting screw 65, positioned within the threaded bore 66 enterthe threaded holes H in the base 50 and hold the cross arm 6! firmlyagainst the base 50. The upper arm 72 of the L-shaped member 69 (Figure16) is provided with an enlarged hole 3, surrounding the roller shaft 56and spaced apart therefrom by a sufiicient distance to permit a certainamount of adjustment of the L-shaped member 68 around its pivot shaft 58without engaging the roller shaft 55.

The L-shaped member 50 is provided with an abutment '54 (Figures 15 and16), which serves as a stop for the end of the former 75 (Figures 14 and16). The former clamping member E5 is secured to the member 60 by meansof the screws 56 in the countersunk recesses 71 in the top surface ofthe former clamping member. The end of the clamping member F5 isprovided with an offset shoulder 78, whereas the upper portion of theupper arm". 12 is likewise provided. with a shoulder 79. These shouldersoverhang to provide a T-shaped transverse slot arranged to receive thebase 80 of the former, generally designated 8i (Figure 16).

The former BI is provided with an upright portion 82 which serves tosupport the forming portion proper 83. The latter consists of a transverse member having a forwardly beveled portion 84 (Figure 14) so thatit and the upright portion 82 are T-shape in cross section.

In the use of the apparatus shown in Figures 12 to 16,- inclusive, themoulding member of Figure 9, with its inner edges M turned up, as shown,is fed over the former B! so that the upper portion 83 thereof entersthe internal part of the moulding. As the moulding is moved over thismember 83, the edges l4 of the shell l3 (Figure 9) are forced firmlyinto engagement with the adjacent edges of the metal shell, stretchingthe shell I3 tightly over the metal base l2 and forcing the edges i linto firm contact therewith, as shown in Figure 10. The rollers 51,meanwhile, serve to assist the passage of the moulding over the formerportion 84 and the lubricating cup, generally designated 85, serves toprovide lubricant through the elbow 86, to the interior of the rollershaft 56. The former portion 83 is forced downward toward the top of therollers 5! by the action of the coil spring 62 (Figure 16), whosetension may be adjusted by moving the screw 65.

It will be understood that we desire to comprehend within our inventionsuch modifications as may be necessary to adapt it to varying conditionsand uses.

Having thus fully described our invention, what we claim as new anddesire to secure by Letters Patent is 1. A clinching device for themanufacture of composite metal mouldings comprising a T- shaped formerhaving the head portion thereof adapted to enter the channel on theunderside of said moulding to press the edges of the covering portionfirmly against the inner side of the base portion, and a rollerpositioned on each side of said former and beneath the head portionthereof, said rollers being arranged to engage the external side of saidmoulding while the head portion of the former presses the coveringportion thereof internally against the base portion.

2. A clinching device for the manufacture of composite metal mouldingscomprising a T- shaped former having the head portion thereof adapted toenter the channel on the underside of said moulding to press the edgesof the covering portion firmly against the inner side of the baseportion, guiding means adjacent said former for guiding the moulding asit passes over the former, and yielding means urging said former towardsaid guiding means.

3. A clinching device for the manufacture of composite metal mouldingscomprising a T- shaped former having the head portion thereof adapted toenter the channel on the underside of said moulding to press the edgesof the covering portion firmly against the inner side of the baseportion, a roller positioned on each side of said former and beneath thehead portion thereof, said rollers being arranged to engage the externalside of said moulding while the head portion of the former presses thecovering portion thereof internally against the base portion, andyielding means urging said former toward said rollers.

4. A clinching device for the manufacture of composite metal mouldingcomprising a T- shaped former having the head portion thereof adapted toenter the channel on the underside of said moulding to press the edgesof the covering portion firmly against the inner side of the baseportion, and guiding means for guiding. the moulding as it passes overthe former, said head portion having its forward edge beveled to providea wedging action when inserted within said moulding.

5. A clinching device for the manufacture of composite metal mouldingscomprising a T- shaped former having the head portion thereof adapted toenter the channel on the underside of said moulding to press the edgesof the covering portion firmly against the inner side of the baseportion, guiding means for guiding the moulding as it passes over theformer, said head portion having its forward edge beveled to provide awedging action when inserted within said moulding, and yielding meansurging said head portion toward said guiding means.

6. A clinching device for the manufacture of composite metal mouldingscomprising a T- shaped former having the head portion thereof adapted toenter the channel on the underside of said moulding to press the edgesof the covering portion firmly against the inner side-of the baseportion, a roller positioned on each side of said former and beneath thehead portion thereof, said rollers being arranged to engage the externalside of said moulding while the head portion of the former presses thecovering portion thereof internally against the base portion, said headportion having its forward edge beveled to provide a wedging action wheninserted within said moulding; and yielding means arranged to urge saidhead portion toward said rollers.

'7. A clinching device for the manufacture of composite metal mouldingscomprising a T- shaped former having the head portion thereof adapted toenter the'channel on the underside of said moulding so as to press theedges of the covering portion firmly against the inner side of the baseportion, a support, a pivot in saidsupport for said former, guidingmeans arranged between said former and said support, and means to urgesaid former toward said guiding means.

8. A clinching device for the manufacture of composite metal mouldingscomprising a T- shaped former having thehead portion thereof adapted toenter the channel on the underside of said moulding so as to press theedges of the covering portion firmly against the inner side of the baseportion, a support, a pivot in said support for said former, guidingmeans arranged between said former and said support, and yield-' ingmeans to urge said former toward said guiding means.

9. A clinching device for the manufacture of composite metal moldingscomprising a former arranged to extend within the base member of themolding and provided with portions which extend over the edges of thebase member for a substantial distance and conform to the shape of thebase member, and yieldingly mounted means for pressing the edges of thecovering of the molding, when assembled on the base member with itsedges extending within the base member, into engagement with said formerand to thereby force the edges of the covering into engagement with thebase member.

SHIRLEY D. MURPHY. FRANK v. OSBORN.

